Easily view liquid movement and level changes from a distance—these sights have an indicator ball inside the glass window.

Machined from one piece of stain- and impact-resistant plastic.

Continuously monitor oil quality through the clear plastic reservoir, and use the attached drain valve to remove water accumulation.

Often used in kilns and other heating equipment, these sights have a quartz window that can withstand temperatures up to 1600° F. They're also known as peep sights.

Mount these sights from the inside of your tank and secure with a lock nut.

Attach to quick-clamp fittings for fast installation and easy removal for cleaning.

Designed with quick-clamp (KF) connections, these sights connect to a port on a high-vacuum chamber, so you can monitor what's happening inside.